1 // SPDX-License-Identifier: GPL-2.0-or-later
3  * wm831x-core.c  --  Device access for Wolfson WM831x PMICs
29 /* Current settings - values are 2*2^(reg_val/4) microamps.  These are
94 	if (!wm831x->locked)  in wm831x_reg_locked()
126 		dev_vdbg(wm831x->dev, "Registers locked\n");  in wm831x_reg_lock()
128 		mutex_lock(&wm831x->io_lock);  in wm831x_reg_lock()
129 		WARN_ON(wm831x->locked);  in wm831x_reg_lock()
130 		wm831x->locked = 1;  in wm831x_reg_lock()
131 		mutex_unlock(&wm831x->io_lock);  in wm831x_reg_lock()
133 		dev_err(wm831x->dev, "Failed to lock registers: %d\n", ret);  in wm831x_reg_lock()
155 		dev_vdbg(wm831x->dev, "Registers unlocked\n");  in wm831x_reg_unlock()
157 		mutex_lock(&wm831x->io_lock);  in wm831x_reg_unlock()
158 		WARN_ON(!wm831x->locked);  in wm831x_reg_unlock()
159 		wm831x->locked = 0;  in wm831x_reg_unlock()
160 		mutex_unlock(&wm831x->io_lock);  in wm831x_reg_unlock()
524 	ret = regmap_read(wm831x->regmap, reg, &val);  in wm831x_reg_read()
544 	return regmap_bulk_read(wm831x->regmap, reg, buf, count);  in wm831x_bulk_read()
559 			return -EPERM;  in wm831x_write()
561 		dev_vdbg(wm831x->dev, "Write %04x to R%d(0x%x)\n",  in wm831x_write()
563 		ret = regmap_write(wm831x->regmap, reg + i, buf[i]);  in wm831x_write()
583 	mutex_lock(&wm831x->io_lock);  in wm831x_reg_write()
587 	mutex_unlock(&wm831x->io_lock);  in wm831x_reg_write()
606 	mutex_lock(&wm831x->io_lock);  in wm831x_set_bits()
609 		ret = regmap_update_bits(wm831x->regmap, reg, mask, val);  in wm831x_set_bits()
611 		ret = -EPERM;  in wm831x_set_bits()
613 	mutex_unlock(&wm831x->io_lock);  in wm831x_set_bits()
842 		.name = "wm831x-backup",
845 		.name = "wm831x-buckv",
851 		.name = "wm831x-buckv",
857 		.name = "wm831x-buckp",
863 		.name = "wm831x-boostp",
869 		.name = "wm831x-clk",
872 		.name = "wm831x-epe",
876 		.name = "wm831x-epe",
880 		.name = "wm831x-gpio",
885 		.name = "wm831x-hwmon",
888 		.name = "wm831x-isink",
894 		.name = "wm831x-isink",
900 		.name = "wm831x-ldo",
906 		.name = "wm831x-ldo",
912 		.name = "wm831x-ldo",
918 		.name = "wm831x-ldo",
924 		.name = "wm831x-ldo",
930 		.name = "wm831x-ldo",
936 		.name = "wm831x-aldo",
942 		.name = "wm831x-aldo",
948 		.name = "wm831x-aldo",
954 		.name = "wm831x-aldo",
960 		.name = "wm831x-alive-ldo",
966 		.name = "wm831x-on",
971 		.name = "wm831x-power",
976 		.name = "wm831x-status",
982 		.name = "wm831x-status",
988 		.name = "wm831x-watchdog",
996 		.name = "wm831x-backup",
999 		.name = "wm831x-buckv",
1005 		.name = "wm831x-buckv",
1011 		.name = "wm831x-buckp",
1017 		.name = "wm831x-boostp",
1023 		.name = "wm831x-clk",
1026 		.name = "wm831x-epe",
1030 		.name = "wm831x-epe",
1034 		.name = "wm831x-gpio",
1039 		.name = "wm831x-hwmon",
1042 		.name = "wm831x-isink",
1048 		.name = "wm831x-isink",
1054 		.name = "wm831x-ldo",
1060 		.name = "wm831x-ldo",
1066 		.name = "wm831x-ldo",
1072 		.name = "wm831x-ldo",
1078 		.name = "wm831x-ldo",
1084 		.name = "wm831x-aldo",
1090 		.name = "wm831x-alive-ldo",
1096 		.name = "wm831x-on",
1101 		.name = "wm831x-power",
1106 		.name = "wm831x-status",
1112 		.name = "wm831x-status",
1118 		.name = "wm831x-watchdog",
1126 		.name = "wm831x-backup",
1129 		.name = "wm831x-buckv",
1135 		.name = "wm831x-buckv",
1141 		.name = "wm831x-buckp",
1147 		.name = "wm831x-boostp",
1153 		.name = "wm831x-clk",
1156 		.name = "wm831x-epe",
1160 		.name = "wm831x-epe",
1164 		.name = "wm831x-gpio",
1169 		.name = "wm831x-hwmon",
1172 		.name = "wm831x-isink",
1178 		.name = "wm831x-isink",
1184 		.name = "wm831x-ldo",
1190 		.name = "wm831x-ldo",
1196 		.name = "wm831x-ldo",
1202 		.name = "wm831x-ldo",
1208 		.name = "wm831x-ldo",
1214 		.name = "wm831x-ldo",
1220 		.name = "wm831x-aldo",
1226 		.name = "wm831x-aldo",
1232 		.name = "wm831x-aldo",
1238 		.name = "wm831x-aldo",
1244 		.name = "wm831x-alive-ldo",
1250 		.name = "wm831x-on",
1255 		.name = "wm831x-power",
1260 		.name = "wm831x-status",
1266 		.name = "wm831x-status",
1272 		.name = "wm831x-watchdog",
1280 		.name = "wm831x-backup",
1283 		.name = "wm831x-buckv",
1289 		.name = "wm831x-buckv",
1295 		.name = "wm831x-buckp",
1301 		.name = "wm831x-buckp",
1307 		.name = "wm831x-clk",
1310 		.name = "wm831x-gpio",
1315 		.name = "wm831x-hwmon",
1318 		.name = "wm831x-ldo",
1324 		.name = "wm831x-ldo",
1330 		.name = "wm831x-ldo",
1336 		.name = "wm831x-ldo",
1342 		.name = "wm831x-ldo",
1348 		.name = "wm831x-ldo",
1354 		.name = "wm831x-aldo",
1360 		.name = "wm831x-aldo",
1366 		.name = "wm831x-aldo",
1372 		.name = "wm831x-aldo",
1378 		.name = "wm831x-alive-ldo",
1384 		.name = "wm831x-on",
1389 		.name = "wm831x-status",
1395 		.name = "wm831x-status",
1401 		.name = "wm831x-watchdog",
1409 		.name = "wm831x-touch",
1417 		.name = "wm831x-rtc",
1425 		.name = "wm831x-backlight",
1455  * Instantiate the generic non-control parts of the device.
1459 	struct wm831x_pdata *pdata = &wm831x->pdata;  in wm831x_device_init()
1461 	enum wm831x_parent parent;  in wm831x_device_init()  local
1464 	mutex_init(&wm831x->io_lock);  in wm831x_device_init()
1465 	mutex_init(&wm831x->key_lock);  in wm831x_device_init()
1466 	dev_set_drvdata(wm831x->dev, wm831x);  in wm831x_device_init()
1468 	wm831x->soft_shutdown = pdata->soft_shutdown;  in wm831x_device_init()
1472 		dev_err(wm831x->dev, "Failed to read parent ID: %d\n", ret);  in wm831x_device_init()
1480 		dev_err(wm831x->dev, "Device is not a WM831x: ID %x\n", ret);  in wm831x_device_init()
1481 		ret = -EINVAL;  in wm831x_device_init()
1487 		dev_err(wm831x->dev, "Failed to read revision: %d\n", ret);  in wm831x_device_init()
1494 		dev_err(wm831x->dev, "Failed to read device ID: %d\n", ret);  in wm831x_device_init()
1502 		dev_info(wm831x->dev, "Device is an engineering sample\n");  in wm831x_device_init()
1503 		ret = wm831x->type;  in wm831x_device_init()
1508 		parent = WM8310;  in wm831x_device_init()
1509 		wm831x->num_gpio = 16;  in wm831x_device_init()
1510 		wm831x->charger_irq_wake = 1;  in wm831x_device_init()
1512 			wm831x->has_gpio_ena = 1;  in wm831x_device_init()
1513 			wm831x->has_cs_sts = 1;  in wm831x_device_init()
1516 		dev_info(wm831x->dev, "WM8310 revision %c\n", 'A' + rev);  in wm831x_device_init()
1520 		parent = WM8311;  in wm831x_device_init()
1521 		wm831x->num_gpio = 16;  in wm831x_device_init()
1522 		wm831x->charger_irq_wake = 1;  in wm831x_device_init()
1524 			wm831x->has_gpio_ena = 1;  in wm831x_device_init()
1525 			wm831x->has_cs_sts = 1;  in wm831x_device_init()
1528 		dev_info(wm831x->dev, "WM8311 revision %c\n", 'A' + rev);  in wm831x_device_init()
1532 		parent = WM8312;  in wm831x_device_init()
1533 		wm831x->num_gpio = 16;  in wm831x_device_init()
1534 		wm831x->charger_irq_wake = 1;  in wm831x_device_init()
1536 			wm831x->has_gpio_ena = 1;  in wm831x_device_init()
1537 			wm831x->has_cs_sts = 1;  in wm831x_device_init()
1540 		dev_info(wm831x->dev, "WM8312 revision %c\n", 'A' + rev);  in wm831x_device_init()
1544 		parent = WM8320;  in wm831x_device_init()
1545 		wm831x->num_gpio = 12;  in wm831x_device_init()
1546 		dev_info(wm831x->dev, "WM8320 revision %c\n", 'A' + rev);  in wm831x_device_init()
1550 		parent = WM8321;  in wm831x_device_init()
1551 		wm831x->num_gpio = 12;  in wm831x_device_init()
1552 		dev_info(wm831x->dev, "WM8321 revision %c\n", 'A' + rev);  in wm831x_device_init()
1556 		parent = WM8325;  in wm831x_device_init()
1557 		wm831x->num_gpio = 12;  in wm831x_device_init()
1558 		dev_info(wm831x->dev, "WM8325 revision %c\n", 'A' + rev);  in wm831x_device_init()
1562 		parent = WM8326;  in wm831x_device_init()
1563 		wm831x->num_gpio = 12;  in wm831x_device_init()
1564 		dev_info(wm831x->dev, "WM8326 revision %c\n", 'A' + rev);  in wm831x_device_init()
1568 		dev_err(wm831x->dev, "Unknown WM831x device %04x\n", ret);  in wm831x_device_init()
1569 		ret = -EINVAL;  in wm831x_device_init()
1576 	if (parent != wm831x->type)  in wm831x_device_init()
1577 		dev_warn(wm831x->dev, "Device was registered as a WM%x\n",  in wm831x_device_init()
1578 			 wm831x->type);  in wm831x_device_init()
1583 		dev_err(wm831x->dev, "Failed to read security key: %d\n", ret);  in wm831x_device_init()
1587 		dev_warn(wm831x->dev, "Security key had non-zero value %x\n",  in wm831x_device_init()
1591 	wm831x->locked = 1;  in wm831x_device_init()
1593 	if (pdata->pre_init) {  in wm831x_device_init()
1594 		ret = pdata->pre_init(wm831x);  in wm831x_device_init()
1596 			dev_err(wm831x->dev, "pre_init() failed: %d\n", ret);  in wm831x_device_init()
1601 	for (i = 0; i < ARRAY_SIZE(pdata->gpio_defaults); i++) {  in wm831x_device_init()
1602 		if (!pdata->gpio_defaults[i])  in wm831x_device_init()
1607 				 pdata->gpio_defaults[i] & 0xffff);  in wm831x_device_init()
1611 	if (pdata->wm831x_num)  in wm831x_device_init()
1612 		wm831x_num = pdata->wm831x_num * 10;  in wm831x_device_init()
1614 		wm831x_num = -1;  in wm831x_device_init()
1623 	switch (parent) {  in wm831x_device_init()
1625 		ret = mfd_add_devices(wm831x->dev, wm831x_num,  in wm831x_device_init()
1631 		ret = mfd_add_devices(wm831x->dev, wm831x_num,  in wm831x_device_init()
1634 		if (!pdata->disable_touch)  in wm831x_device_init()
1635 			mfd_add_devices(wm831x->dev, wm831x_num,  in wm831x_device_init()
1641 		ret = mfd_add_devices(wm831x->dev, wm831x_num,  in wm831x_device_init()
1644 		if (!pdata->disable_touch)  in wm831x_device_init()
1645 			mfd_add_devices(wm831x->dev, wm831x_num,  in wm831x_device_init()
1654 		ret = mfd_add_devices(wm831x->dev, wm831x_num,  in wm831x_device_init()
1665 		dev_err(wm831x->dev, "Failed to add children\n");  in wm831x_device_init()
1674 		dev_err(wm831x->dev, "Failed to read clock status: %d\n", ret);  in wm831x_device_init()
1679 		ret = mfd_add_devices(wm831x->dev, wm831x_num,  in wm831x_device_init()
1683 			dev_err(wm831x->dev, "Failed to add RTC: %d\n", ret);  in wm831x_device_init()
1687 		dev_info(wm831x->dev, "32.768kHz clock disabled, no RTC\n");  in wm831x_device_init()
1690 	if (pdata->backlight) {  in wm831x_device_init()
1691 		/* Treat errors as non-critical */  in wm831x_device_init()
1692 		ret = mfd_add_devices(wm831x->dev, wm831x_num, backlight_devs,  in wm831x_device_init()
1696 			dev_err(wm831x->dev, "Failed to add backlight: %d\n",  in wm831x_device_init()
1702 	if (pdata->post_init) {  in wm831x_device_init()
1703 		ret = pdata->post_init(wm831x);  in wm831x_device_init()
1705 			dev_err(wm831x->dev, "post_init() failed: %d\n", ret);  in wm831x_device_init()
1715 	mfd_remove_devices(wm831x->dev);  in wm831x_device_init()
1728 	if (wm831x->charger_irq_wake) {  in wm831x_device_suspend()
1744 			dev_info(wm831x->dev,  in wm831x_device_suspend()
1757 	if (wm831x->soft_shutdown) {  in wm831x_device_shutdown()
1758 		dev_info(wm831x->dev, "Initiating shutdown...\n");  in wm831x_device_shutdown()